Carbon-coated attapulgite clay composite material and its preparation method

The technology of attapulgite clay and composite material is applied in the field of nanomaterials, which can solve the problems of small adsorption capacity and incomplete adsorption, and achieve the effects of simple preparation method, low price and wide source.

Inactive Publication Date: 2013-04-24
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these adsorbents have disadvantages such as small adsorption capacity and incomplete adsorption.

Method used

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  • Carbon-coated attapulgite clay composite material and its preparation method
  • Carbon-coated attapulgite clay composite material and its preparation method
  • Carbon-coated attapulgite clay composite material and its preparation method

Examples

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preparation example Construction

[0043]The present invention also provides a method for preparing a carbon-coated attapulgite clay composite material, comprising the following steps:

[0044] The attapulgite clay and glucose were mixed in water, and the carbon-coated attapulgite clay composite material was obtained after carbonization reaction.

[0045] The invention uses attapulgite clay as a template and glucose as a raw material to obtain a carbon-coated attapulgite clay composite material. The raw material is cheap and has a wide range of sources, the preparation method is simple, and there is no pollution to the environment. The obtained carbon-coated attapulgite clay composite material The clay composite material has good adsorption capacity and has a remarkable effect when used to adsorb and remove heavy metal ions in water.

[0046] The invention firstly mixes the attapulgite clay and glucose in water, and after uniform stirring, the glucose undergoes carbonization reaction using the attapulgite clay ...

Embodiment 1

[0055] At room temperature, 0.5g of attapulgite clay and 1.5g of glucose were dissolved in 38mL of water, and after stirring evenly, the resulting mixed solution was transferred to a polytetrafluoroethylene reactor; the reactor was heated to 160°C and reacted at constant temperature for 48h; then Cool the reactor to room temperature, filter the obtained reaction product with a filter membrane with a pore size of 220 nm, wash the filtered product with water and ethanol respectively, and dry it in an oven at 60°C for 24 hours to obtain a carbon-coated attapulgite clay composite material.

[0056] The carbon-coated attapulgite clay composite was observed with a field emission scanning electron microscope, and the results can be found in figure 1 , figure 2 and image 3 , figure 1 The low-magnification scanning electron micrograph of the carbon-coated attapulgite clay composite material provided by Example 1 of the present invention, figure 2 A high-magnification scanning ele...

Embodiment 2

[0060] At room temperature, dissolve 0.5g of attapulgite clay and 4.0g of glucose in 38mL of water, stir well and transfer the resulting mixed solution into a polytetrafluoroethylene reactor; raise the temperature of the reactor to 160°C, and react at a constant temperature for 48h; then Cool the reactor to room temperature, filter the obtained reaction product with a filter membrane with a pore size of 220 nm, wash the filtered product with water and ethanol respectively, and dry it in an oven at 60°C for 24 hours to obtain a carbon-coated attapulgite clay composite material.

[0061] The carbon-coated attapulgite clay composite was observed with a field emission scanning electron microscope, and the results can be found in Figure 7 and Figure 8 , Figure 7 The low-magnification scanning electron micrograph of the carbon-coated attapulgite clay composite material provided by Example 2 of the present invention, Figure 8 A high-magnification scanning electron micrograph of...

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Abstract

The invention provides a carbon-coated attapulgite clay composite material, which consists of: attapulgite clay and carbon nano-particles coated on the surface of the attapulgite clay. The invention also provides a preparation method of the carbon-coated attapulgite clay composite material. The method comprises the steps of: mixing attapulgite clay with glucose in water, and leaving them to undergo a carbonization reaction so as to obtain the carbon-coated attapulgite clay composite material. The carbon-coated attapulgite clay composite material provided in the invention has a strong adsorption capacity, can achieve a significant effect in adsorption removal of heavy metals from water, and has a good adsorption removal capacity on both bivalent lead ions and hexavalent chromium ions in water. Experimental results show that, when used for removal of heavy metal ions in water, the carbon-coated attapulgite clay composite material provided in the invention has an adsorption capacity higher than that of attapulgite clay, activated carbon, oxidative activated carbon, carbon aerogels, carbon nanotubes, chitosan polymer and other adsorbents.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a carbon-coated attapulgite clay composite material and a preparation method thereof. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds, such as lead, chromium, cadmium, mercury, arsenic, etc. Among the pollution, a small part is manifested in air pollution and solid waste pollution. Heavy metals are not only non-biodegradable, but also bioaccumulative, which can cause serious harm to the environment and human health. For example, when drinking water contains a lot of hexavalent chromium ions, it will increase the risk of diarrhea, bladder cancer, liver cancer, kidney cancer, skin cancer and other diseases; divalent lead ions will affect human intelligence, red blood cells and nervous system; Mercury ions sink directly into the liver, which is extremely destructive to the brain, nerves, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62
Inventor 俞书宏陈立锋梁海伟
Owner UNIV OF SCI & TECH OF CHINA
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